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https://bugzilla.mozilla.org/show_bug.cgi?id=643051
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  <title>Test for Bug 643051</title>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=643051">Mozilla Bug 643051</a>
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/** Test for Bug 643051 **/
document.cookie = "a=; expires=Thu, 01-Jan-1970 00:00:01 GMT";  // clear cookie
document.cookie = "a2=; expires=Thu, 01-Jan-1970 00:00:01 GMT";  // clear cookie
document.cookie = "a3=; expires=Thu, 01-Jan-1970 00:00:01 GMT";  // clear cookie

// single cookie, should work
document.cookie = "a=bar";
is(document.cookie, "a=bar", "Can't read stored cookie!");

document.cookie = "a2=bar\na3=bar";
is(document.cookie, "a=bar; a2=bar", "Wrong cookie value");

document.cookie = "a2=baz; a3=bar";
is(document.cookie, "a=bar; a2=baz", "Wrong cookie value");

// clear cookies again to avoid affecting other tests
document.cookie = "a=; expires=Thu, 01-Jan-1970 00:00:01 GMT";
document.cookie = "a2=; expires=Thu, 01-Jan-1970 00:00:01 GMT";
document.cookie = "a3=; expires=Thu, 01-Jan-1970 00:00:01 GMT";
</script>
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